CVE-2021-24009

Name: CVE-2021-24009
Creator: NVD / NIST
Published: 2022-04-06T10:15:07.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.46%

Last modified Jun 17, 2026

CVE-2021-24009 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. Multiple improper neutralization of special elements used in an OS command vulnerabilities (CWE-78) in the Web GUI of FortiWAN before 4.5.9 may allow an authenticated attacker to execute arbitrary commands on the underlying system's shell via specifically crafted HTTP requests.. EPSS estimates a 1.46% chance of exploitation in the next 30 days.

Description

Multiple improper neutralization of special elements used in an OS command vulnerabilities (CWE-78) in the Web GUI of FortiWAN before 4.5.9 may allow an authenticated attacker to execute arbitrary commands on the underlying system's shell via specifically crafted HTTP requests.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.46%

70.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-78

Affected Software

Vendor	Product	Versions
Fortinet	Fortiwan	<= 4.5.8

References

https://fortiguard.com/psirt/FG-IR-21-060Patch, Vendor Advisory
https://fortiguard.com/psirt/FG-IR-21-060Patch, Vendor Advisory

Timeline

Published: Apr 6, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-24009?

How severe is CVE-2021-24009?

CVE-2021-24009 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.46% probability of exploitation in the next 30 days.

How do I fix CVE-2021-24009?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-24009?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST